Guided drill system for oil reservoir drilling

Abstract

A drill guidance device, a method to control a trajectory of a drill, and a non-transitory computer readable medium that determine the corrected drill angle and send an output signal to a drill controller configured to control an angle of a drill. The corrected drill angle is determined by at least one of a slant angle data and a formation property data received from a sensor device. The drill guidance device, the method to control a trajectory of a drill, and the non-transitory computer readable medium can be implemented in a measuring while drilling model to provide live guidance during a drilling operation or a predictive model to plan prior to the start of a drilling operation. The corrected drill angle is acted upon by a drill controller to maximize the productivity of an oil reservoir.

The invention claimed is: 
     
       1. A guided drill system, comprising:
 a drill controller, 
 a drill, 
 one or more sensors, and 
 a drill guidance device, wherein the drill controller is electronically connected to the drill guidance device which is electronically connected to the drill, and wherein the sensors are located on the drill and electronically connected to the drill guidance device; 
 wherein the drill guidance device comprises:
 circuitry configured to: 
 determine a slant angle of a drill based on directional sensor data received from one or more sensor devices, 
 determine one or more formation properties based on formation sensor data received from the one or more sensor devices, 
 determine at least one of the slant angle or the formation property to increment, 
 determine a first productivity index from the slant angle or the formation property, 
 determine a second productivity index from an incremented slant angle or an incremented formation property, and 
 calculate a corrected drill angle based on the slant angle and the formation properties corresponding to the greater of the first productivity index and the second productivity index, and 
 output the corrected drill angle to a drill controller configured to control an angle of trajectory of the drill, 
 wherein the first productivity index and the second productivity index (J) is defined by: 
 
 
       
         
           
             
               
                 J 
                 = 
                 
                   
                     kh 
                     
                       141.2 
                       [ 
                       
                         ln 
                         ( 
                         
                           
                             r 
                             e 
                           
                           
                             r 
                             w 
                           
                         
                         ) 
                       
                       ] 
                     
                   
                   + 
                   
                     
                       0.0025 
                       [ 
                       
                         
                           h 
                           0.65 
                         
                         ⁢ 
                         
                           
                             
                               k 
                               0.52 
                             
                             ( 
                             
                               tan 
                               ⁢ 
                               
                                 θ 
                                 4 
                               
                             
                             ) 
                           
                           1.22 
                         
                       
                       ] 
                     
                     1.9267 
                   
                 
               
               , 
             
           
         
         
           wherein r e  is a drainage radius or an external boundary radius and r w  is a wellbore radius, slant angle is θ, formation permeability is k, and formation thickness is h. 
         
       
     
     
       2. The guided drill system, of  claim 1 , wherein the circuitry is further configured to determine the slant angle based on the directional sensor data received from the sensors, and wherein the sensors include at least one of an accelerometer and a magnetometer. 
     
     
       3. The guided drill system, of  claim 1 , wherein one of the formation properties is a formation permeability. 
     
     
       4. The guided drill system, of  claim 3 , wherein the formation permeability is based on the formation sensor data received from a porosity sensor located on the drill. 
     
     
       5. The guided drill system, of  claim 1 , wherein one of the formation properties is a formation thickness. 
     
     
       6. The guided drill system, of  claim 5 , wherein the formation thickness is based on the formation sensor data received from a resistivity sensor or a conductivity sensor located on the drill. 
     
     
       7. The guided drill system, of  claim 1 , wherein the circuitry is further configured to recursively calculate the second productivity index when the second productivity index is less than the first productivity index. 
     
     
       8. The guided drill system, of  claim 1 , wherein the circuitry is further configured to determine the corrected drill angle based on a productivity index predictively calculated by accessing historical data from memory. 
     
     
       9. The guided drill system, of  claim 1 , wherein the corrected drill angle is based on a continuously calculated productivity index in a measuring while drilling operation.